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Seasonal Occurrence Of The Aphid Parasitoid Aphidius Colemani Viereck (Hymenoptera: Aphidiidae) In Middle Delta, Egypt
- H. M. Sobhy1, A. H. El-Heneidy2, S. M. N. Abd-El Wahed1 and W. Z. A. Mikhail1
- 1 Institute of African Research and Studies, Cairo University, Giza, Egypt.
- 2 Plant Protection Research Institute, ARC, Giza, Egypt.
- The first Arab Conference of Applied Biological Pest Control, Cairo, Egypt, 5-7 April 2004
Abstract
Survey and seasonal occurrence of aphid parasitoid species, particularly Aphidius colemani Viereck (Hymenoptera: Aphidiidae) associated with aphid species on wheat plants were carried out in two Governorates; Gharbia and Menofia in Egypt for the two wheat seasons 2000/01 and 2001/02. The survey revealed the presence of the primary parasitoids species; Aphidius colemani Viereck, A. matricariae Haliday, Diaeretiella rapae Mclntosh, Praon necans Mackauer, Epedrus persicae Froggat, Aphidius spp., and Aphelinus spp., and the hyperparasitoid species; Alloxysta spp., and other cynipids, pteromalids, and Dendrocerus spp. associated with different cereal aphid species in wheat fields. In both areas; Kafr El-Zayat (Gharbia) and El-Shuhada (Menofia), total numbers of primary and hyperparasitoid were higher in the second season 2001/02 than in the first season 2000/01. Percentages of A. colemani were higher during the first season than those of the second one. Among the surveyed primary parasitoids species, the total percentage of A. colemani reached 14.2 and 21.7 % in the first season, compared to 13.6 and 12.5 % in the second season at Kafr El-Zayat and El-Shuhada, respectively.
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